17
ICH8/ICH9—NVM Information Guide
The following table lists the LED modes defined in bits 3:0 of this word.
5 LED1 Blink Mode 0b
This bit defines the LED1 blink mode:
0b = Blink at 200 ms on and 200 ms off (slow rate for ICH9).
1b = Blink at 83 ms on and 83 ms off (fast rate for ICH9).
This field should be identical to LED0 Blink Mode.
4 Filtered ACT LED 0b
Enable Filtered Activity LED (while operating with the 82562V)
When set to 0b, the activity LED is activated by the PHY.
when set to 1b, the activity LED is driven by Tx activity or Rx traffic
that match any of the MAC's MAC addresses.
For the 82566/82567, this bit is reserved and should be set to
0b.
3:0 LED1 Mode 0111b
These bits represent the initial value of the LED1_MODE field,
which specifies the event, state, or pattern displayed on LED1
(LINK_1000) output. Tab le 15 defines the values for LED1 Mode.
A value of 0111b indicates that a 1000 Mb/s link is established and
maintained.
Table 14. LED 1 Configuration and Power Management (Word 17h)
Table 15. LED Modes
Mode (Bits
3:0)
Selected Mode Source Indication
0000b LINK_10/1000
Asserted when either 10 Mb/s or 1000 Mb/s link is established
and maintained.
0001b LINK_100/1000
Asserted when either 100 Mb/s or 1000 Mb/s link is
established and maintained.
0010b LINK-UP Asserted when any speed link is established and maintained.
0011b FILTER_ACTIVITY
Asserted when link is established and packets are being
transmitted or received that passed MAC filtering.
0100b LINK/ACTIVITY
Asserted when link is established and when there is no
transmit or receive activity.
0101b LINK_10 Asserted when a 10 Mb/s link is established and maintained.
0110b LINK_100 Asserted when a 100 Mb/s link is established and maintained.
0111b LINK_1000 Asserted when a 1000 Mb/s link is established and maintained.
1000b Reserved Reserved.
1001b FULL_DUPLEX Asserted when the link is configured for full duplex operation.
1010b COLLISION Asserted when a collision is observed.
1011b ACTIVITY
Asserted when link is established and packets are being
transmitted or received.
1100b BUS_SIZE Asserted when the MAC detects a 1-lane PCIe* connection.
1101b PAUSED Asserted when the MAC transmitter is flow controlled.
1110b LED_ON Always asserted.
1111b LED_OFF Always de-asserted.
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